Calorimetry Mini Problem Set! Here, you will nominate a scribe from each group who will write a description of how to find the solutions to problems 1-7. The answer itself is already on the little sheet.
Question Number
Descriptive Answer
1
Given:
Mass of Cu = 1kg
(C= 0.385 kJ/kg °C)
ΔT= 80 - 20 = 60 °C
Q cu= (1kg)(0.385 kJ/kg °C)(60 °C)= 23.1 kJ
Mass of water = 0.5 kg
(C = 4.184 J/g °C)
ΔT= 80 - 20 = 60 °C
Q water= (0.5kg)(4.184 J/g °C)(60 °C) =125.5 kJ
Q total= 125.5 + 23.1 = 148.6 KJ
2
3
4
Given:
Volume (water) = 0.500 cubic meters
Specific Heat (water) = 4.18 J/g°C
ΔT: 20 °C
Solution:
0.500 cubic meters
= 0.5 * 1 cubic meter
= 0.5 * (1 m * 1 m* 1 m)
= 0.5 * (100 cm * 100 cm * 100 cm)
= 0.5 * (1,000,000 cm)
= 500,000 cubic centimeters
1 cubic centimeter = 1 gram
Mass (water) = 500,000 grams
q = m * C * ΔT
q = 500,000 g * 4.18 J/g°C * 20 °C
q = 41,800,000 J
q = 41,800 kJ
41,800 kJ / (52.5 kJ/g)
= 41,800 kJ * (1 g / 52.5 kJ)
= 796 g
Mass of Cu = 1kg
(C= 0.385 kJ/kg °C)
ΔT= 80 - 20 = 60 °C
Q cu= (1kg)(0.385 kJ/kg °C)(60 °C)= 23.1 kJ
Mass of water = 0.5 kg
(C = 4.184 J/g °C)
ΔT= 80 - 20 = 60 °C
Q water= (0.5kg)(4.184 J/g °C)(60 °C) =125.5 kJ
Q total= 125.5 + 23.1 = 148.6 KJ
Volume (water) = 0.500 cubic meters
Specific Heat (water) = 4.18 J/g°C
ΔT: 20 °C
Solution:
0.500 cubic meters
= 0.5 * 1 cubic meter
= 0.5 * (1 m * 1 m* 1 m)
= 0.5 * (100 cm * 100 cm * 100 cm)
= 0.5 * (1,000,000 cm)
= 500,000 cubic centimeters
1 cubic centimeter = 1 gram
Mass (water) = 500,000 grams
q = m * C * ΔT
q = 500,000 g * 4.18 J/g°C * 20 °C
q = 41,800,000 J
q = 41,800 kJ
41,800 kJ / (52.5 kJ/g)
= 41,800 kJ * (1 g / 52.5 kJ)
= 796 g